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Unites saliva Am h helica LAFAYETTE ,HINGKLEY, on SAN FRANCISCO,GALIFULRNLA, restless c raannwnnt, on SAME Prisca, ADMINISTRATBIK orssinnines- LEY, 'nncnasnn,

ere sense.

E-iEEEKFECAEION forming part 01'' Letters Fatent N0. MQME, dated April3%, h9 1.

V Application filed November 23, 1880. (No inhdel.)

1 To cit toll-cm it may concern:

. Be it hnown that I, LAFAYETTE Humanity, of the and county ofSauFrancisco, in the State oi California, have invented an ImprovedMethod of Rendering Nitro-Glycerine and its Qomponnds Non-Explosive byOrdinary Shochs or Jars; and i do hereby declare that i 1 the followingis a full, clear," and exact (1e scriptiou thereof. 7 v 4 The object ofmy invention is to render nitro'glycerine, and such highly-explosivecompounds as contain nitro-glycerinesecure from esplosion by accident orpercussin, so'that. they cawbesaicly' handled in bulk or fired eut of agun without being exploded by the shock or in resulting therefrom:

- I have discovered that if nitro-glycerine, or any compound containingnitro glycerine, be

confined in a vessel, tube, cartridgqor shell under pressure it cannotbe exploded by any ordinary amount of shock, jar, or percussion to whichit may hesubjected in transportation or handling, and that cartridges orshells loaded with nitro-glycerinaor any of its explosive products orcombinations can be safely tired outola gun or cannon without beingexploded by the shock, if it be confined in the cart-ridge or shellunder pressure, and that when thus confined no force less than onesufficient to shatter or burst the'cartridge or shell will cause it toexplode. This enables me to toad a shell with nitro-glycerine, gian tpowder, or other compound containing nitroglycerine, and the it from'agun or cannon with ordinary gunpowder. The shock consequenton firing theshell will not explode the nitro-glyceriue contained in the shell; butthe. conoussion-ersudden force consequent on the strihingotthe shell atthe end of its flight will, it it strikes a solid substance, shatter orburst the shell, and cause the nitro-glycerine or its-communal toexplode with fearful violease and effect. V

Nitreglycerine can be put np-in cartridges under pressure, and in thiscondition transported from place to place without the least dangerefaccidental or spontaneous explosion, and cartridges thus prepared willbe the cheapest and most attractive blasting agent in stantially asabove specified.

existence, asthe nitro-glycerine can be exploded by means of a cap inthe usual way. Suchcartridges are especially valuable for open-airblasting, or for blasting under water.

H itro-glycerine, by ,bein g kept in vessels an:

der pressure, canbe transported in bulk withas much safety asordinarily-inflammable oils. in constructing and manufacturing shells ofthe character above mentioned I make the .shell with a screw-plugarranged-to screw into threads on the plug will cut their way i nto thesolder without causing an explosion, even it' a portion ofnitro-glycerine should be ground between them. This fact I have provenby frequent tests. 7 The force which explodes nitro-glycerine must be asudden force, percussive in its character, and it must act directly uponthe nitro-glyceriue. The amount of pressure necessary to be exerted onthe glycerine is immaterial, so long as it prevents any quick action ofthe glycerine when it is subjected to motion, jar, or shock.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

The mode or method of renderingnitro-g'lycerine and compounds containingintro-glycerine non-explosive by ordinary shocks'or jars,

consisting in confining it in closed vessels,

tubes, cartridges, or shells under pressure, sub- In witness whereof Ihave hereunto set my hand and seal.

LAFAYETTE HINGKLEY. [1,. s] attest;

J no.1). BOONE, Wit. h. bases.

